Rhizoctonia violacea (or is it Rhizoctonia corcorum?) leads to violet root rot. While it is likely that infected roots suffer from reduced storability, it is does not appear that the disease spreads during storage.
The disease is known to be in Sweden, with occurrences related to light soil and the presence of other root crops in the rotation, including carrots and potatoes.
NBR Reference: Önnestad, 2022-10-07, Lars Persson.